Magnetic resonance spectroscopy basic principles

Basic principles of MRS. The overall physical principles and characteristics of magnetic resonance spectroscopy (MRS) are identical to those described previously in the MRI section. In fact, magnetic resonance spectroscopy can simply be thought of as just another way of expressing the NMR signals that are recorded during an NMR experiment. Whether it is an MRI or and MRS experiment, virtually all of the same equipment is used and all of the basic NMR principles still apply. The prime difference that separates basic MRS from modern-day MRI is that in MRS, the... 

H. Noth, B. Wrackmeyer, Nuclear Magnetic Resonance Spectroscopy of Boron Compounds, in NMR - Basic Principles and Progress, P. Diehl, E. Fluck, R. Kosfeld, eds., Vol. 14, Springer Verlag, Berlin-Heidelberg-New York, 1978. 

The aim of this text is to introduce the fascinating topic of the hyphenation of chromatographic separation techniques with nuclear magnetic resonance spectroscopy to an interested readership with a background either in organic, pharmaceutical or medical chemistry. The basic principles of NMR spectroscopy, as well as those of separation science, should previously be known to the reader. 

B-1978MI417-01 H. Noth and B. Wrackmeyer Nuclear magnetic resonance spectroscopy of boron compounds, in NMR- Basic Principles... 

M. Rudin, guest ed., In-Vivo Magnetic Resonance Spectroscopy / Probeheads and Radiofrequency Pulses, Spectrum Analysis, NMR - Basic Principles and Progress Vol. 26, Springer, Berlin, 1992. 

Basic Principles of Nuclear Magnetic Resonance Spectroscopy... 

Besides infrared spectroscopy the most convenient method for deducing the molecular structure is nuclear magnetic resonance spectroscopy (nmr). The basic principle of this method is the detection of changes in the orientation of the atomic nuclear spin of hydrogen (the spin of a proton) and carbon (the spin of the nucleus of the isotope). 

N6th, H., Wrackmeyer, B. Nuclear Magnetic Resonance Spectroscopy of Boron Compounds . In NMR, Basic Principles and Progress Diehl, P., Fluck, E., Kosfeld, R., Eds. Springer-Verlag Berlin, 1978 Vol. 14. 

Library of Congress Cataloging in Publication Data. Pregosin, P. S. P and C NMR of transition metal phosphine complexes. (NMR, basic principles and progress 16) Bibliography p. Includes index. 1. Nuclear magnetic resonance spectroscopy. 2. Transition metal compounds. 

Basic principles of modem NMR spectroscopy are the subject of many textbooks [167,188-196], including pulse techniques [197] for NMR of polymers, see Bodor [198]. A guide to multinuclear magnetic resonance is also available [199]. Several texts deal specifically with multidimensional NMR spectroscopy [169,197,200-202]. Ernst et al. [169] have reviewed the study of dynamic processes, such as chemical exchange... 

Electron paramagnetic resonance (EPR) and NMR spectroscopy are quite similar in their basic principles and in experimental techniques. They detect different phenomena and thus yield different information. The major use of EPR spectroscopy is in the detection of free radicals which are uniquely characterised by their magnetic moment that arises from the presence of an unpaired electron. Measurement of a magnetic property of a material containing free radicals, like its magnetic susceptibility, provides the concentration of free radicals, but it lacks sensitivity and cannot reveal the structure of the radicals. Electron paramagnetic resonance spectroscopy is essentially free from these defects. 

Before describing the application of Nuclear magnetic resonance (NMR) spectroscopy to potentized homeopathic drugs we would first discuss the basic principles of NMR spectroscopy. This spectroscopy is a powerful tool providing structural information about molecules. Like UV-visible and infra red spectrometry, NMR spectrometry is also a form of absorption spectrometry. Nuclei of some isotopes possess a mechanical spin and the total angular momentum depends on the nuclear spin, or spin number 1. The numerical value of I is related to the mass number and the atomic number and may be 0, Vi, 1 etc. The medium of homeopathic... 

The focus of this edition remains the same as that for the first, namely, to make electrochemistry an attractive, useful characterization methodology for chemists [comparable to infrared (IR), nuclear magnetic resonance (NMR) spectroscopy, and mass spectrometry (MS)]. The goal is to outline the basic principles and modem methodology of electrochemistry in such a way that the uninitiated may gain sufficient background to use electrochemical methods for the study of chemical systems. Thus chemical problems that are amenable to an electrochemical approach are introduced as representative examples. 

Spectroscopy has become a powerful tool for the determination of polymer structures. The major part of the book is devoted to techniques that are the most frequently used for analysis of rubbery materials, i.e., various methods of nuclear magnetic resonance (NMR) and optical spectroscopy. One chapter is devoted to (multi) hyphenated thermograviometric analysis (TGA) techniques, i.e., TGA combined with Fourier transform infrared spectroscopy (FT-IR), mass spectroscopy, gas chromatography, differential scanning calorimetry and differential thermal analysis. There are already many excellent textbooks on the basic principles of these methods. Therefore, the main objective of the present book is to discuss a wide range of applications of the spectroscopic techniques for the analysis of rubbery materials. The contents of this book are of interest to chemists, physicists, material scientists and technologists who seek a better understanding of rubbery materials. 

This phenomenon of super-radiance is used in the photon-echo technique for high-resolution spectroscopy to measure population and phase decay times, expressed by the longitudinal and transverse relaxation times Ti and T2, see (7.1). This technique is analogous to the spin-echo method in nuclear magnetic resonance (NMR) [904]. Its basic principle may be understood in a simple model, transferred from NMR to the optical region [905]. 

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